Display screen or portion thereof with transitional graphical user interface



FIG. 1 is a front view of a display screen or portion thereof withtransitional graphical user interface showing a first image of a firstembodiment of the claimed design;

FIG. 2 is a front view showing a second image of the first embodiment;

FIG. 3 is a front view of a first image of a second embodiment of theclaimed design;

FIG. 4 is a front view showing a second image of the second embodiment;

FIG. 5 is a front view of a first image of a third embodiment of theclaimed design;

FIG. 6 is a front view showing a second image of the third embodiment;

FIG. 7 is a front view of a first image of a fourth embodiment of theclaimed design; and,

FIG. 8 is a front view showing a second image of the fourth embodiment.

The appearance of the transition is sequential from FIG. 1 to FIG. 2 inthe first embodiment, from FIG. 3 to FIG. 4 in the second embodiment,from FIG. 5 to FIG. 6 in the third embodiment, and from FIG. 7 to FIG. 8in the fourth embodiment. The process or period in which an imagetransitions to another image forms no part of the claimed design.

The longer-length broken-line showing of a portion of a display screenand the intermediate-length broken-line showing of a display screenboundary, are included for the purpose of illustrating environmentalstructure and form no part of the claimed design. The remaining brokenlines show elements of the graphical user interface that form no part ofthe claimed design.

CLAIM The ornamental design for a display screen or portion thereof withtransitional graphical user interface, as shown and described.